diff --git a/soh/soh/Enhancements/ExtraModes/EnemyRandomizer.cpp b/soh/soh/Enhancements/ExtraModes/EnemyRandomizer.cpp
index f4a3dd5a34..07341235f0 100644
--- a/soh/soh/Enhancements/ExtraModes/EnemyRandomizer.cpp
+++ b/soh/soh/Enhancements/ExtraModes/EnemyRandomizer.cpp
@@ -1,3 +1,5 @@
+#include <spdlog/spdlog.h>
+
 #include "functions.h"
 #include "macros.h"
 #include "soh/ShipUtils.h"
@@ -1018,8 +1020,9 @@ void RegisterEnemyRandomizer() {
                                  ? (player->actor.world.pos.y - 1500.0f)
                                  : (player->actor.world.pos.y - 1000.0f);
             if (enemy->world.pos.y < killHeight) {
-                LUSLOG_INFO(
-                    "AfterActorUpdateBgCheckInfo: Killing enemy, out of bounds (id 0x%x, pos x %.1f y %.1f z %.1f)",
+                SPDLOG_INFO(
+                    "AfterActorUpdateBgCheckInfo: Killing enemy, out of bounds (id {:#x}, pos x {:.1f} y {:.1f} z "
+                    "{:.1f})",
                     enemy->id, enemy->world.pos.x, enemy->world.pos.y, enemy->world.pos.z);
                 Actor_Kill(enemy);
             }
diff --git a/soh/soh/Enhancements/game-interactor/GameInteractor_RawAction.cpp b/soh/soh/Enhancements/game-interactor/GameInteractor_RawAction.cpp
index 544a66ea4a..c19a69297a 100644
--- a/soh/soh/Enhancements/game-interactor/GameInteractor_RawAction.cpp
+++ b/soh/soh/Enhancements/game-interactor/GameInteractor_RawAction.cpp
@@ -1,3 +1,5 @@
+#include <spdlog/spdlog.h>
+
 #include "GameInteractor.h"
 #include "soh/ShipUtils.h"
 #include <math.h>
@@ -268,7 +270,7 @@ void GameInteractor::RawAction::UnsetFlag(int16_t flagType, int16_t flag) {
             break;
         case FlagType::FLAG_RANDOMIZER_INF:
             if (!IS_RANDO) {
-                LUSLOG_ERROR("Tried to unset randomizerInf flag outside of rando (%d)", flag);
+                SPDLOG_ERROR("Tried to unset randomizerInf flag outside of rando ({})", flag);
                 assert(false);
                 break;
             }
diff --git a/soh/soh/Enhancements/randomizer/SeedContext.cpp b/soh/soh/Enhancements/randomizer/SeedContext.cpp
index e1db1c4967..e74d96b40e 100644
--- a/soh/soh/Enhancements/randomizer/SeedContext.cpp
+++ b/soh/soh/Enhancements/randomizer/SeedContext.cpp
@@ -419,7 +419,7 @@ void Context::ParseSpoiler(const char* spoilerFileName) {
         mTrials->ParseJson(spoilerFileJson);
         mSpoilerLoaded = true;
         mSeedGenerated = false;
-    } catch (...) { LUSLOG_ERROR("Failed to load Spoiler File: %s", spoilerFileName); }
+    } catch (...) { SPDLOG_ERROR("Failed to load Spoiler File: {}", spoilerFileName); }
 }
 
 void Context::ParseHashIconIndexesJson(const nlohmann::json& spoilerFileJson) {
diff --git a/soh/soh/Enhancements/randomizer/ShuffleFairies.cpp b/soh/soh/Enhancements/randomizer/ShuffleFairies.cpp
index 487b02602a..143c902379 100644
--- a/soh/soh/Enhancements/randomizer/ShuffleFairies.cpp
+++ b/soh/soh/Enhancements/randomizer/ShuffleFairies.cpp
@@ -1,3 +1,5 @@
+#include <spdlog/spdlog.h>
+
 #include "soh/OTRGlobals.h"
 #include "soh/Enhancements/game-interactor/GameInteractor.h"
 #include "randomizer_grotto.h"
@@ -6,6 +8,7 @@
 #include "soh/Enhancements/item-tables/ItemTableTypes.h"
 #include "soh/ObjectExtension/ObjectExtension.h"
 #include "soh/Enhancements/randomizer/randomizer.h"
+#include "soh/Enhancements/randomizer/randomizerEnumStrings.h"
 
 extern "C" {
 #include "src/overlays/actors/ovl_En_Elf/z_en_elf.h"
@@ -67,7 +70,7 @@ CheckIdentity ShuffleFairies_GetFairyIdentity(int32_t params, ActorID id) {
     Rando::Location* location = OTRGlobals::Instance->gRandomizer->GetCheckObjectFromActor(id, sceneNum, params);
 
     if (location->GetRandomizerCheck() == RC_UNKNOWN_CHECK) {
-        LUSLOG_WARN("FairyGetIdentity did not receive a valid RC value (%d).", location->GetRandomizerCheck());
+        SPDLOG_WARN("FairyGetIdentity did not receive a valid RC value ({}).", location->GetRandomizerCheck());
         assert(false);
     } else {
         fairyIdentity.randomizerInf = static_cast<RandomizerInf>(location->GetCollectionCheck().flag);
diff --git a/soh/soh/Enhancements/randomizer/ShuffleRocks.cpp b/soh/soh/Enhancements/randomizer/ShuffleRocks.cpp
index c0e0ce5e4f..d5317ff196 100644
--- a/soh/soh/Enhancements/randomizer/ShuffleRocks.cpp
+++ b/soh/soh/Enhancements/randomizer/ShuffleRocks.cpp
@@ -147,8 +147,6 @@ uint8_t Rock_RandomizerHoldsItem(CheckIdentity rockIdentity, PlayState* play, bo
 }
 
 void Rock_RandomizerSpawnCollectible(Actor* actor, CheckIdentity rockIdentity, PlayState* play) {
-    LUSLOG_INFO("ROCKdrop %d\t:\t%d, %d", rockIdentity.randomizerCheck, (s16)actor->world.pos.x,
-                (s16)actor->world.pos.z);
     EnItem00* item00 = (EnItem00*)Item_DropCollectible2(play, &actor->world.pos, ITEM00_SOH_DUMMY);
     item00->randoInf = rockIdentity.randomizerInf;
     item00->itemEntry = Rando::Context::GetInstance()->GetFinalGIEntry(rockIdentity.randomizerCheck, true, GI_NONE);
@@ -217,9 +215,7 @@ static CheckIdentity IdentifyRock(s32 sceneNum, s32 posX, s32 posZ) {
     Rando::Location* location = OTRGlobals::Instance->gRandomizer->GetCheckObjectFromActor(
         ACTOR_EN_ISHI, sceneNum, TWO_ACTOR_PARAMS(posX, posZ));
 
-    if (!IdentifyCheck(&rockIdentity, location)) {
-        SPDLOG_WARN("IdentifyRock did not receive a valid RC value %d,%d.", posX, posZ);
-    }
+    IdentifyCheck(&rockIdentity, location);
 
     return rockIdentity;
 }
@@ -228,13 +224,6 @@ void EnIshi_RandomizerInit(void* actorRef) {
     Actor* actor = static_cast<Actor*>(actorRef);
     EnIshi* rockActor = static_cast<EnIshi*>(actorRef);
     auto rockIdentity = IdentifyRock(gPlayState->sceneNum, (s16)actor->world.pos.x, (s16)actor->world.pos.z);
-    if (rockIdentity.randomizerCheck == RC_MAX) {
-        LUSLOG_WARN("ROCK ishi  %d\t:\t%d, %d", rockIdentity.randomizerCheck, actor->params & 1,
-                    (s16)actor->world.pos.x, (s16)actor->world.pos.z);
-    } else {
-        LUSLOG_INFO("ROCK ishi%d %d\t:\t%d, %d", rockIdentity.randomizerCheck, actor->params & 1,
-                    (s16)actor->world.pos.x, (s16)actor->world.pos.z);
-    }
 
     if (Rock_RandomizerHoldsItem(rockIdentity, gPlayState, actor->params & 1) && rockActor->actor.draw != nullptr) {
         ObjectExtension::GetInstance().Set<CheckIdentity>(actor, std::move(rockIdentity));
@@ -246,13 +235,7 @@ void ObjBombiwa_RandomizerInit(void* actorRef) {
     Actor* actor = static_cast<Actor*>(actorRef);
     ObjBombiwa* rockActor = static_cast<ObjBombiwa*>(actorRef);
     auto rockIdentity = IdentifyRock(gPlayState->sceneNum, (s16)actor->world.pos.x, (s16)actor->world.pos.z);
-    if (rockIdentity.randomizerCheck == RC_MAX) {
-        LUSLOG_INFO("ROCK bombiwa\t:\t%d, %d", rockIdentity.randomizerCheck, (s16)actor->world.pos.x,
-                    (s16)actor->world.pos.z);
-    } else {
-        LUSLOG_INFO("ROCK bombiwa%d\t:\t%d, %d", rockIdentity.randomizerCheck, (s16)actor->world.pos.x,
-                    (s16)actor->world.pos.z);
-    }
+
     if (Rock_RandomizerHoldsItem(rockIdentity, gPlayState, true) && rockActor->actor.draw != nullptr) {
         ObjectExtension::GetInstance().Set<CheckIdentity>(actor, std::move(rockIdentity));
         rockActor->actor.draw = ObjBombiwa_RandomizerDraw;
@@ -263,13 +246,7 @@ void ObjHamishi_RandomizerInit(void* actorRef) {
     Actor* actor = static_cast<Actor*>(actorRef);
     ObjHamishi* rockActor = static_cast<ObjHamishi*>(actorRef);
     auto rockIdentity = IdentifyRock(gPlayState->sceneNum, (s16)actor->world.pos.x, (s16)actor->world.pos.z);
-    if (rockIdentity.randomizerCheck == RC_MAX) {
-        LUSLOG_WARN("ROCK hamishi\t:\t%d, %d", rockIdentity.randomizerCheck, (s16)actor->world.pos.x,
-                    (s16)actor->world.pos.z);
-    } else {
-        LUSLOG_INFO("ROCK hamishi%d\t:\t%d, %d", rockIdentity.randomizerCheck, (s16)actor->world.pos.x,
-                    (s16)actor->world.pos.z);
-    }
+
     if (Rock_RandomizerHoldsItem(rockIdentity, gPlayState, true) && rockActor->actor.draw != nullptr) {
         ObjectExtension::GetInstance().Set<CheckIdentity>(actor, std::move(rockIdentity));
         rockActor->actor.draw = ObjHamishi_RandomizerDraw;
diff --git a/soh/soh/Enhancements/randomizer/location_access.cpp b/soh/soh/Enhancements/randomizer/location_access.cpp
index 6d2f177a5b..45e3061076 100644
--- a/soh/soh/Enhancements/randomizer/location_access.cpp
+++ b/soh/soh/Enhancements/randomizer/location_access.cpp
@@ -6,7 +6,7 @@
 #include "soh/Enhancements/debugger/performanceTimer.h"
 
 #include <fstream>
-#include <libultraship/log/luslog.h>
+#include <spdlog/spdlog.h>
 #include <soh/OTRGlobals.h>
 
 #include "3drando/shops.hpp"
@@ -498,8 +498,8 @@ Rando::Entrance* Region::GetExit(RandomizerRegion exitToReturn) {
         }
     }
 
-    LUSLOG_ERROR("ERROR: EXIT \"%s\" DOES NOT EXIST IN \"%s\"", RegionTable(exitToReturn)->regionName.c_str(),
-                 this->regionName.c_str());
+    SPDLOG_ERROR("ERROR: EXIT \"{}\" DOES NOT EXIST IN \"{}\"", RegionTable(exitToReturn)->regionName,
+                 this->regionName);
     assert(false);
     return nullptr;
 }
diff --git a/soh/soh/Enhancements/randomizer/randomizer.cpp b/soh/soh/Enhancements/randomizer/randomizer.cpp
index d882f415e4..d5b538819d 100644
--- a/soh/soh/Enhancements/randomizer/randomizer.cpp
+++ b/soh/soh/Enhancements/randomizer/randomizer.cpp
@@ -5,6 +5,7 @@
 
 #include <nlohmann/json.hpp>
 #include <ship/window/FileDropMgr.h>
+#include <spdlog/spdlog.h>
 
 #include "randomizer.h"
 #include "3drando/menu.hpp"
@@ -17,6 +18,7 @@
 #include "settings.h"
 #include "soh/util.h"
 #include "randomizerTypes.h"
+#include "randomizerEnumStrings.h"
 #include "soh/ObjectExtension/ObjectExtension.h"
 #include "soh/Enhancements/randomizer/RCToRandInf.h"
 #include "dungeon.h"
@@ -1139,8 +1141,8 @@ static bool ChildTradeSlotOccupied() {
 
 extern "C" u16 Randomizer_Item_Give(PlayState* play, GetItemEntry giEntry) {
     if (giEntry.modIndex != MOD_RANDOMIZER) {
-        LUSLOG_WARN(
-            "Randomizer_Item_Give was called with a GetItemEntry with a mod index different from MOD_RANDOMIZER (%d)",
+        SPDLOG_WARN(
+            "Randomizer_Item_Give was called with a GetItemEntry with a mod index different from MOD_RANDOMIZER ({})",
             giEntry.modIndex);
         assert(false);
         return -1;
@@ -1456,7 +1458,7 @@ extern "C" u16 Randomizer_Item_Give(PlayState* play, GetItemEntry giEntry) {
             break;
         }
         default:
-            LUSLOG_WARN("Randomizer_Item_Give didn't have behaviour specified for getItemId=%d", item);
+            SPDLOG_WARN("Randomizer_Item_Give didn't have behaviour specified for getItemId={}", item);
             assert(false);
             return -1;
     }
diff --git a/soh/soh/Enhancements/speechsynthesizer/ESpeakSpeechSynthesizer.cpp b/soh/soh/Enhancements/speechsynthesizer/ESpeakSpeechSynthesizer.cpp
index 83b048aade..c5af34eb60 100644
--- a/soh/soh/Enhancements/speechsynthesizer/ESpeakSpeechSynthesizer.cpp
+++ b/soh/soh/Enhancements/speechsynthesizer/ESpeakSpeechSynthesizer.cpp
@@ -1,6 +1,6 @@
 #include <dlfcn.h>
 
-#include <libultraship/log/luslog.h>
+#include <spdlog/spdlog.h>
 
 #include "ESpeakSpeechSynthesizer.h"
 
@@ -16,7 +16,7 @@ bool ESpeakSpeechSynthesizer::DoInit() {
         this->Terminate = (speak_Terminate)dlsym(espeak, "espeak_Terminate");
         if (this->Initialize == NULL || this->SetVoiceByProperties == NULL || this->Synth == NULL ||
             this->Terminate == NULL) {
-            lusprintf(__FILE__, __LINE__, 2, "Failed to load espeak-ng");
+            SPDLOG_INFO("Failed to load espeak-ng");
             dlclose(espeak);
             return false;
         } else {
@@ -37,7 +37,7 @@ void ESpeakSpeechSynthesizer::DoUninitialize() {
 
 void ESpeakSpeechSynthesizer::Speak(const char* text, const char* language) {
     if (this->espeak == NULL) {
-        lusprintf(__FILE__, __LINE__, 2, "Spoken Text (%s): %s", language, text);
+        SPDLOG_INFO("Spoken Text ({}): {}", language, text);
     } else {
         if (language != this->mLanguage) {
             espeak_VOICE voice = { .languages = language };
diff --git a/soh/soh/Enhancements/speechsynthesizer/SpeechLogger.cpp b/soh/soh/Enhancements/speechsynthesizer/SpeechLogger.cpp
index e525dba019..03c73188a3 100644
--- a/soh/soh/Enhancements/speechsynthesizer/SpeechLogger.cpp
+++ b/soh/soh/Enhancements/speechsynthesizer/SpeechLogger.cpp
@@ -1,4 +1,4 @@
-#include <libultraship/log/luslog.h>
+#include <spdlog/spdlog.h>
 
 #include "SpeechLogger.h"
 
@@ -6,7 +6,7 @@ SpeechLogger::SpeechLogger() {
 }
 
 void SpeechLogger::Speak(const char* text, const char* language) {
-    lusprintf(__FILE__, __LINE__, 2, "Spoken Text (%s): %s", language, text);
+    SPDLOG_INFO("Spoken Text ({}): {}", language, text);
 }
 
 bool SpeechLogger::DoInit() {
diff --git a/soh/soh/z_play_otr.cpp b/soh/soh/z_play_otr.cpp
index a9537cea22..78c637b7d3 100644
--- a/soh/soh/z_play_otr.cpp
+++ b/soh/soh/z_play_otr.cpp
@@ -48,8 +48,7 @@ extern "C" void OTRPlay_SpawnScene(PlayState* play, s32 sceneId, s32 spawn) {
 
     // Failed to load scene... default to doodongs cavern
     if (play->sceneSegment == nullptr) {
-        lusprintf(__FILE__, __LINE__, 2, "Unable to load scene %s... Defaulting to Doodong's Cavern!\n",
-                  scenePath.c_str());
+        SPDLOG_INFO("Unable to load scene {}... Defaulting to Doodong's Cavern!", scenePath);
         OTRPlay_SpawnScene(play, 0x01, 0);
         return;
     }